Date: Mon, 15 Mar 1999 15:37:35 +0100 From: Eivind Eklund <eivind@FreeBSD.ORG> To: Yusuf Goolamabbas <yusufg@huge.net> Cc: freebsd-hackers@FreeBSD.ORG, reiser@ricochet.net, sct@redhat.com Subject: Re: Has anybody used Postmark for file system benchmark Message-ID: <19990315153735.B98270@bitbox.follo.net> In-Reply-To: <19990315082704.1035.qmail@yusufg.portal2.com>; from Yusuf Goolamabbas on Mon, Mar 15, 1999 at 08:27:04AM -0000 References: <19990315082704.1035.qmail@yusufg.portal2.com>
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On Mon, Mar 15, 1999 at 08:27:04AM -0000, Yusuf Goolamabbas wrote: > Postmark is available at > > http://www.netapp.com/technology/level3/3022.html > > I am currently trying it out on various FreeBSD 3.1-STABLE boxes (It > compiled cleanly). Thought I would check with others if they had any > experience with this. According to the paper , UFS on Solaris 2.5 > sucks so I am seeing what FreeBSD (and possibly softupdates can do) > > Hope to provide some results soon. I shall be also trying on Linux > boxes (On Linux, I am getting the following error) Remember that the default tuning on the FreeBSD boxes and the Linux boxes are different; this has to be reflected if you're going to attempt to do a fair benchmark. The different modes are Linux FreeBSD Fully synchronous sync sync "Synchronous" metadata, async data N/A (default mode) Fully async (unordered metadata writes)[1] default async Tracking dependencies N/A "soft updates" [1] This mode is highly disfunctional if your data is critical. The normal file system invariants (e.g, that data you write end up in a file you own) are not honoured across unscheduled reboots. It is very useful for news spools etc, of course. Comparing the Linux default to the FreeBSD default is pretty uninteresting; the tradeoffs are totally different. IMO, the most interesting compares are Linux sync against FreeBSD anything-but-async, and Linux async vs FreeBSD async. When you're giving out results, please also include information about the exact hardware platform - a hardware platform that caches will tend to skew the results. Eivind. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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